refactor: simplify exception handling and code flow

src/main.cpp

@@ -5,30 +5,18 @@
 
 int main()
 {
- try
- {
+ try {
  Gomoku gomoku;
  gomoku.run();
- }
- catch(const std::runtime_error& e)
- {
+ return 0;
+ } catch(const std::runtime_error& e) {
  std::cerr << "Exception: " << e.what() << "\n";
- std::cerr << "Press enter to exit...\n";
- std::string line;
- std::getline(std::cin, line);
- std::getline(std::cin, line);
- return 1;
- }
- catch(...)
- {
- std::cerr << "Unknown exception\b";
- std::cerr << "Press enter to exit...\n";
- std::string line;
- std::getline(std::cin, line);
- std::getline(std::cin, line);
- return 1;
+ } catch(...) {
+ std::cerr << "Unknown exception\n";
  }
-
-
- return 0;
+ std::cerr << "Press enter to exit...\n";
+ std::string line;
+ std::getline(std::cin, line);
+ std::getline(std::cin, line);
+ return 1;
 }